10... c8f5 One of several possible lines. I particularly like 10...h6 with the idea of playing g6-g5, leading to a sharp position. 11. f3h4 This is the problem of developing a bishop on f5 when you have a pawn on g6; the piece has to move on the same diagonal. 11... f5c8  12. f1e1  12... f6g4 Maneuvering the knight to e5 is a well-known positional idea in the Benoni.